74 Dart. Headers vs manifold.

If your priority is fuel economy, then you probably shouldn’t be starting with a 40+ year old iron that has a V8. Best to buy a modern 4 cylinder econo bucket that will give you at least double to maybe three times the fuel economy you’ll ever get out of the Dart.

Driving an old car is great but don’t fool yourself into thinking the old car can also be really fuel efficient.